.\"-
.\" SPDX-License-Identifier: BSD-2-Clause
.\"
.\" Copyright (c) 2008 Weongyo Jeong
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.Dd November 10, 2024
.Dt URTW 4
.Os
.Sh NAME
.Nm urtw
.Nd Realtek RTL8187B/L USB IEEE 802.11b/g wireless network driver
.Sh SYNOPSIS
To compile this driver into the kernel,
place the following lines in your kernel configuration file:
.Bd -ragged -offset indent
.Cd "device ehci"
.Cd "device uhci"
.Cd "device ohci"
.Cd "device usb"
.Cd "device urtw"
.Cd "device wlan"
.Ed
.Pp
Alternatively, to load the driver as a module at boot time,
place the following line in
.Xr loader.conf 5 :
.Bd -literal -offset indent
if_urtw_load="YES"
.Ed
.Sh DESCRIPTION
The
.Nm
driver supports USB 802.11b/g wireless adapters based on the
Realtek RTL8187B/L.
.Pp
.Nm
supports
.Cm station
and
.Cm monitor
mode operation.
Only one virtual interface may be configured at any time.
.Pp
For more information on configuring this device, see
.Xr ifconfig 8 .
.Sh HARDWARE
The
.Nm
driver supports Realtek RTL8187B/L based wireless network devices, including:
.Pp
.Bl -column -offset indent "Shuttle XPC Accessory PN20" "RTL8225" "USB" -compact
.It Em Card Ta Em Radio Ta Em Bus
.It Belkin F5D7050E Ta RTL8225 Ta USB
.It Linksys WUSB54GCv2 Ta RTL8225 Ta USB
.It Netgear WG111v2 Ta RTL8225 Ta USB
.It Netgear WG111v3 Ta RTL8225 Ta USB
.It Safehome WLG-1500SMA5 Ta RTL8225 Ta USB
.It Shuttle XPC Accessory PN20 Ta RTL8225 Ta USB
.It Sitecom WL168v1 Ta RTL8225 Ta USB
.It Sitecom WL168v4 Ta RTL8225 Ta USB
.It SureCom EP-9001-g(2A) Ta RTL8225 Ta USB
.It TRENDnet TEW-424UB V3.xR Ta RTL8225 Ta USB
.El
.Sh EXAMPLES
Join an existing BSS network (i.e., connect to an access point):
.Pp
.Dl ifconfig wlan create wlandev urtw0 inet 192.0.2.20/24
.Pp
Join a specific BSS network with network name
.Ar my_net :
.Pp
.Dl ifconfig wlan create wlandev urtw0 ssid my_net up
.Pp
Join a specific BSS network with 64-bit WEP encryption:
.Bd -literal -offset indent
ifconfig wlan create wlandev urtw0 ssid my_net \e
    wepmode on wepkey 0x1234567890 weptxkey 1 up
.Ed
.Sh SEE ALSO
.Xr intro 4 ,
.Xr netintro 4 ,
.Xr usb 4 ,
.Xr wlan 4 ,
.Xr wlan_ccmp 4 ,
.Xr wlan_tkip 4 ,
.Xr wlan_wep 4 ,
.Xr ifconfig 8 ,
.Xr wpa_supplicant 8
.Rs
.%T Realtek
.%U https://www.realtek.com
.Re
.Sh HISTORY
The
.Nm
device driver first appeared in
.Fx 8.0 .
.Sh AUTHORS
.An -nosplit
The
.Nm
driver was written by
.An Weongyo Jeong Aq Mt weongyo@FreeBSD.org .
